less_dart 0.1.1 less_dart: ^0.1.1 copied to clipboard
Native Dart Less transformer to build .css files from .less files.
Less integration for pub #
Less-transformer for pub-serve,
pub-build and pub-run
This is a traslation from less 1.7.5 Javascript (over nodejs) to Dart. Is a pure Dart implementation.
pub-run usage #
CMD> pub run lessc [args] file.less file.css
A working example: CMD> pub run lessc test/less/charsets.less
And a error example: CMD> pub run lessc --no-color test/less/errors/import-subfolder1.less
pub-build and pub-serve usage #
Simply add the following lines to your pubspec.yaml
:
dependencies:
less_dart: any
transformers:
- less_dart:
entry_point: web/builder.less
After adding the transformer your entry_point .less
file will be automatically transformed to
corresponding .css
file.
Configuration #
You can also pass options to Lessc if necessary:
transformers:
- less_dart:
entry_points:
- path/to/builder.less
- or/other.less
output: /path/to/builded.css
include_path: /path/to/directory/for/less/includes
cleancss: true or false
compress: true or false
build_mode: less, dart or mixed
other_flags:
- to include in the lessc command line
- entry_point - Is the ONLY option required. Normally is a builder file with "@import 'filexx.less'; ..." directives.
- entry_points - Alternative to entry_point. Let process several .less input files.
- output - Only works with one entry_point file. Is the .css file generated. If not supplied (or several entry_points) then input .less with .css extension changed is used.
- include_path - see Less Documentation include_path.
- cleancss - see Less Documentation clean-css.
- compress - see Less Documentation compress.
- build_mode -
- less - command 'CMD> lessc --flags input.less > output.css' is used.
- dart - command 'CMD> lessc --flags -' with stdin and stdout piped in the dart transformer process. See build folder.
- mixed - command 'CMD> lessc --flags input.less' with stdout managed by the dart transformer process. See build folder.
- less - command 'CMD> lessc --flags input.less > output.css' is used.
- other_flags - Let add other flags such as (-line-numbers=comments, ...) in the lessc command line.
How to use in other programs #
- import 'package:less_dart/less.dart';
- create the Less class: Less less = new Less();
- call transform future.
See a example in: test/simply_test.dart
Known issues #
-
Sources from lessc 1.7.5.
-
Pass the standard tests in windows (no tested in linux).
-
Javascript and Dart have different way to treat null, true, ... Many bug must be eliminated yet.
-
cleanCSS not implemented yet.
-
source-map not implemented yet.
-
error color output. Implemented, but not tested in linux. In windows cmd don't work.
-
Added option --banner=bannerfile.txt. Could change in next versions according to official version.
-
Javascript evaluation not supported. If this is a problem use less_node
License #
Copyright (c) 2009-2015 Alexis Sellier & The Core Less Team.
Copyright (c) 2014-2014 Adalberto Lacruz for dart translation.
Licensed under the Apache License.